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Convertible Senior Notes - Additional Information (Details)
 3 Months Ended 6 Months Ended
Dec. 31, 2021
USD ($)
May 02, 2017
USD ($)
d
$ / shares
Jun. 30, 2022
USD ($)
Jun. 30, 2021
USD ($)
Dec. 31, 2020
USD ($)
Jun. 30, 2022
USD ($)
$ / shares
Jun. 30, 2021
USD ($)
Debt Instrument [Line Items]              
Loss on extinguishment of convertible senior notes     $ 70,000,000.0 $ 0   $ 70,000,000.0 $ 0
Accounting Standards Update [Extensible List] Accounting Standards Update 2020-06            
Convertible senior notes $ 335,100,000   169,000,000.0     169,000,000.0  
Accumulated deficit (635,800,000)   (564,300,000)     (564,300,000)  
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2020-06              
Debt Instrument [Line Items]              
Convertible senior notes 42,200,000            
Deferred tax liabilities 9,900,000            
Additional Paid in Capital 106,800,000            
Accumulated deficit 74,500,000            
2.25% Convertible senior notes due 2024              
Debt Instrument [Line Items]              
Principal Amount 381,200,000 $ 517,500,000 170,400,000     170,400,000  
Interest rate percentage   2.25%          
Carrying amount of the liability component upon issuance   $ 368,300,000          
Convertible senior note assumed borrowing rate   7.50%          
Convertible senior note carrying value of the equity component   $ 149,200,000          
Convertible senior notes term   7 years          
Transaction cost related to issuance of convertible senior notes   $ 14,700,000          
Aggregate principal amount repurchased     210,800,000   $ 136,200,000 210,800,000  
Aggregate repurchase price paid in cash     279,000,000   186,900,000    
Fair value of the liability component immediately before extinguishment         130,700,000    
Equity component of repurchased convertible senior notes         56,300,000    
Carrying amount of the liability component at settlement         112,400,000    
Loss on extinguishment of convertible senior notes     70,000,000   $ 18,400,000    
Convertible senior notes $ 335,100,000   $ 169,000,000.0     $ 169,000,000.0  
Convertible senior notes convertible in to shares   0.0131711          
Convertible senior notes conversion price (in USD per share) | $ / shares   $ 75.92          
Convertible senior notes premium   42.50%          
Market price of common stock (in USD per share) | $ / shares   $ 53.28          
Convertible senior notes redemption rate   100.00%          
2.25% Convertible senior notes due 2024 | Conversion Period One              
Debt Instrument [Line Items]              
Threshold consecutive common stock trading days | d   30          
Threshold percentage of common stock price trigger   130.00%          
Common stock price trigger (in USD per share) | $ / shares           $ 98.70  
Threshold common stock trading days | d   20          
2.25% Convertible senior notes due 2024 | Conversion Period Two              
Debt Instrument [Line Items]              
Principal amount on conversion rate   $ 1,000          
Threshold common stock trading days | d   5          
Minimum percentage of common stock price trigger   98.00%          
2.25% Convertible senior notes due 2024 | Measurement Input, Discount Rate              
Debt Instrument [Line Items]              
Discount rate         0.0337